1. Delta Air Lines, Inc., McDonnell Douglas, DC-9-14, N3305L, Greater Southwest International Airport, Fort Worth, Texas, May 30, 1972, Aircraft Accident Report NTSB-AAR-73-3, National Transportation Safety Board, May 1972.
2. Safety issues related to wake vortex encounters during visual approach to landing, Special Investigation Report NTSB/SIR-94/01, National Transportation Safety Board, February 1994.
3. Wake Turbulence Training Aid, § 2, Pilot and Air Traffic Controller Guide to Wake Turbulence; §§ 2.3, Review of Accidents and Incidents, Memorandum DOT/FAA/RD-95/6, Federal Aviation Administration, April 1995.
4. SESAR Concept of Operations, WP2.2.2/D3 DLT-0612-222-01-00, SESAR Consortium, July 2007. Available at https://www.eurocontrol.int/sites/default/files/field_tabs/content/documents/sesar/20070717-sesar-conops.pdf.
5. Concept of Operations for the Next Generation Air Transportation System, Joint Planning and Development Office, Version 3.2, September 2010. Available at http://www.dtic.mil/dtic/tr/fulltext/u2/a535795.pdf.